Antenna substrate



FIG. 1 is a perspective view of the front, right and top of an antennasubstrate showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a right side view thereof; and,

FIG. 8 is a perspective reference view thereof.

The broken line showing of a connector in FIG. 8 depicts environmentonly and forms no part of the claimed design.

The ornamental design for an antenna substrate, as shown and described.